Legend:

If you are familiar with a cool little thing named [http://en.wikipedia.org/wiki/Raspberry_Pi Raspberry Pi] (a credit-card-sized single-board computer, shortly called RPi) and you need to compile your FFmpeg source code to be able to run it on [http://en.wikipedia.org/wiki/Raspbian Raspbian] (a Debian Linux-based operating system optimized for the Raspberry Pi hardware), then this tutorial might help you.